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Robust Frequency and Voltage Stability Control Strategy for Standalone AC/DC Hybrid Microgrid

Energies, 2017
The microgrid (MG) concept is attracting considerable attention as a solution to energy deficiencies, especially in remote areas, but the intermittent nature of renewable sources and varying loads cause many control problems and thereby affect the ...
Furqan Asghar, Muhammad Talha, Sung Ho Kim +2 more
doaj +1 more source

Laser frequency stabilization to a single ion

, 2005
A fundamental limit to the stability of a single-ion optical frequency standard is set by quantum noise in the measurement of the internal state of the ion.
Bergquist J C +13 more
core +2 more sources

Short-Term Frequency Response of a DFIG-Based Wind Turbine Generator for Rapid Frequency Stabilization

Energies, 2017
This paper proposes a short-term frequency-response scheme of a doubly-fed induction generator (DFIG)-based wind turbine generator (WTG) for improving rotor speed recovery and frequency nadir.
Dejian Yang +6 more
doaj +1 more source

Frequency stabilization of an external-cavity diode laser [PDF]

, 1990
Using a hybrid optical/electronic technique, an external-cavity diode laser was frequency stabilized with respect to the sub-Doppler spectrum of cesium vapor.
Brecha, R. J. +3 more
core +1 more source

Intrinsic Temperature and Pressure Compensation of Thin-Film Acoustic Resonators

Applied Sciences
Stabilization of the resonance frequency in thin-film acoustic devices to variations in environmental conditions is commonly reduced to the passive or active compensation of a single factor (usually temperature) and the isolation or addition of a ...
Sergiu Cojocaru
doaj +1 more source

Study on the external cavity laser frequency stabilization based on fuzzy PID control

上海师范大学学报. 自然科学版, 2019
A fuzzy proportion,integral,differential(PID) control algorithm was proposed for the external cavity laser to achieve better frequency stability.The Matlab stimulation results demonstrated that the fuzzy PID control algorithm performed more effectively ...
WANG Yang +4 more
doaj +1 more source

Slow light frequency reference cavities—proof of concept for reducing the frequency sensitivity due to length fluctuations

New Journal of Physics, 2022
Length changes due to thermo-mechanical noise originating from, for example, Brownian motion are a key limiting factor of present day state-of-the-art laser frequency stabilization using Fabry–Pérot cavities.
Sebastian P Horvath +6 more
doaj +1 more source

Offset frequency dynamics and phase noise properties of a self-referenced 10 GHz Ti:sapphire frequency comb

, 2011
This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb based on a femtosecond Ti:sapphire laser.
Bartels, Albrecht, Diddams, Scott A., Heinecke, Dirk C. +2 more
core +1 more source

Efficacy and Safety Analysis of Roxarestat in Regulating Renal Anemia in Patients on Maintenance Hemodialysis

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley +1 more source

Carrier-envelope offset frequency measurement by means of an external optical resonator

Frontiers in Physics, 2023
A general-purpose method based on the implementation of the asymmetric Pound–Drever–Hall (PDH) technique is proposed to measure the carrier-envelope offset (CEO) frequency of a mode-locked laser using an external optical cavity.
Dario Giannotti +11 more
doaj +1 more source

laser frequency stabilization